{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Before dobutamine was begun , no therapy was given during the first visit , and patients were randomized on subsequent visits to receive metoprolol or metoprolol plus glucagon 1 mg ."}
{"Disease": [], "Chemical": ["dobutamine", "metoprolol"]}